family Compositae vs genus Echinops

family Compositae and genus Echinops both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
genus Echinops	Yes	No	No	No

family Compositae (noun)	genus Echinops (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of Mediterranean and Eurasian herbs: globe thistles